JPH078962U - Connection structure between circuit boards - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a connection structure between circuit boards, which has a margin in a positioning allowable range for connection and can be easily manufactured. [Structure] Fine conductor lines 31, 31 extending obliquely with respect to the extending direction of the patterns 2, 2'formed on a pair of circuit boards connected to each other and crossing the patterns 2, 2 '. ′ Is provided so that the conductor lines 31 and 31 ′ intersect and are pressed against each other when connecting the circuit boards.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection structure between circuit boards in which electric circuit boards are connected to each other.

[0002]

[Prior art]

 Conventionally, a connection structure for connecting one circuit board to the other circuit board is required to be capable of performing connection with high contact pressure with low operating force. As such a connection structure, for example, as shown in FIG. 7, conductive protrusions (bumps) 4 are formed on the pattern 2 of one circuit board 1 by a manufacturing method such as plating or etching by secondary processing. There is a method in which both circuit boards are connected by forming a protrusion and pressing the protrusion 4 so as to match the connection terminal in the pattern 2 of the other circuit board 1.

In the case of this connection structure, since the pressing force is concentrated on the protrusion 4, a high contact pressure can be obtained. As a result, the protrusion 4 breaks the oxide film on the surface of the connection terminal, and provides good electrical connection between the circuit boards.

[0004]

[Problems to be solved by the device]

 In the case of the connection structure described above, since the connection is made by aligning the protruding part of one circuit board with the connection terminal of the other circuit board, an allowable range for the line width of the connection terminal is allowed at the time of connection. There is a drawback that high accuracy is required for directional positioning. Further, there is also a problem that after forming a pattern on one of the circuit boards, the projecting portion must be provided on the pattern by secondary processing, resulting in an increase in cost due to an increase in manufacturing steps.

The present invention has been made in order to solve such a problem, and its technical problem is that there is a margin in a positioning allowable range at the time of connection, and a connection structure between circuit boards which can be easily manufactured. To provide.

[0006]

[Means for Solving the Problems]

 According to the present invention, in a connection structure between circuit boards in which a first circuit board having a first connection terminal and a second circuit board having a second connection terminal are connected to each other, The first and second connection terminals have a connection structure in which the circuit boards are connected to each other by intersecting each other.

According to the present invention, in the connection structure between the circuit boards, the first connection terminal is a first conductor wire formed on a pattern on the first circuit board, The second connection terminal is a second conductor wire formed on the pattern on the second circuit board, and the first and second conductor wires intersect each other and are between the circuit boards pressed and contacted with each other. A connection structure is obtained.

Further, according to the present invention, in the connection structure between the circuit boards, the first connection terminal is the first conductor wire coupled to the tip of the pattern on the first circuit board, and the second Is a second conductor wire coupled to the tip of the pattern on the second circuit board, and the first and second conductor wires intersect each other and the connection structure between the circuit boards pressed and contacted with each other. Is obtained.

In addition, according to the present invention, in the connection structure between circuit boards, the first connection terminal is a first conductor wire formed on a pattern on the first circuit board. , The second connection terminal is a second conductor wire coupled to the tip of the pattern on the second circuit board, and the first and second conductor wires intersect each other and are pressed and contacted to each other. A connection structure between them is obtained.

Further, according to the present invention, in any one of the above-described circuit board interconnection structures, the pattern extends in a predetermined direction, and at least one of the first and second conductor lines has the above-mentioned structure. A connection structure between circuit boards that extends obliquely with respect to a predetermined direction can be obtained.

[0011]

【Example】

 Hereinafter, the connection structure between circuit boards of the present invention will be described in detail with reference to the drawings by way of examples.

FIG. 1 is a perspective view showing a configuration of a main part of a connection structure between circuit boards according to an embodiment of the present invention. In this connection structure, a plurality of conductive patterns 2 forming an electric circuit are provided on the first circuit board 1, and a protective layer 5 is provided thereon. These patterns 2 are separated from each other and extend in a predetermined direction parallel to the longitudinal direction of the circuit board 1. One end of each pattern 2 in a predetermined direction is located near the end face of the circuit board 1. In the vicinity of the other end of each pattern 2, as shown in the figure, a fine first conductor wire 31 as a first connecting terminal is formed obliquely to a predetermined direction and across the pattern 2. Has been done. Here, the conductor wires 31 are all formed so as to be aligned in the same direction.

Also, a plurality of patterns 2'is similarly provided on the second circuit board 1'connected to the first circuit board 1, and a protective layer 5'is provided thereon. In the vicinity of the other end of these patterns 2 ', a fine second conductor wire 31' as a second connecting terminal intersecting the first conductor wire 31 is formed diagonally with respect to a predetermined direction, and moreover, in a pattern. It is formed across 2 '.

Next, the connection between the first circuit board 1 and the second circuit board 1 ′ having such a configuration will be described with reference to FIGS. 2 and 3. However, for the sake of convenience in each drawing, the circuit board will be omitted and only the connection of the patterns will be described.

First, referring to FIG. 2, a first conductor line 31 is provided on the pattern 2 of the first circuit board 1 and a first conductor line 31 is provided on the pattern 2'of the second circuit board 1 '. Of the conductor wire 31 '. Here, when the end faces of each circuit board are butted so that the patterns 2 and 2 ′ face each other, the conductor wire 31 of the pattern 2 of the circuit board 1 located on the lower side and the circuit located on the upper side. The conductor line 31 'of the pattern 2'of the substrate 1'is crossed and brought into contact with it. Therefore, when one circuit board is pressed toward the other circuit board side so that the two circuit boards 1 and 1'are relatively close to each other, as shown in FIG. Are pressed against each other to be in a conductive contact state. In this state, even if there is a slight positional deviation in the width direction of the patterns 2 and 2'and the extending direction thereof, the conductor wires 31 and 31 'are always energized and contacted if they face each other. Therefore, the range in which the positional deviation can be tolerated increases.

The permissible range of this energizing contact will be specifically described with reference to FIG. First, the misalignment between the patterns 2 and 2'in the pattern width direction is caused by the fact that the tip 31a on the pattern end face side of the conductor wire 31 and the end 31b 'located on the pattern side face part of the conductor wire 31' come into contact with each other. The distance to the point where the line 31 and the tip 31a 'of the conductor wire 31' on the pattern end face side contact each other, that is, a range of about twice the distance L1 in the width direction of the pattern 2 is allowed.

Next, the positional deviation allowable range in the extending direction of the pattern 2 will be described. In this case, the distance from the point where the tips 31a, 31a 'of the conductor wires 31, 31' in both patterns 2, 2'contact each other to the point where the ends 31b, 31b 'contact each other, that is, The distance that is about twice the distance L 2 in the direction along the extending direction of the pattern 2 of the conductor wire 31 is the positional deviation allowable range.

Incidentally, the energization contact here is usually performed under the condition that the positioning accuracy is controlled to some extent, and therefore, in the case where an extreme positional deviation such as the above-mentioned maximum allowable range occurs, it can be almost ignored. . Further, the actual positional deviation does not exist only in the extending direction and the width direction of the patterns 2 and 2 ', but also in the direction in which these patterns are combined. In such a case, the distances L1 and L2 are also multiplied. Since the combined area becomes the allowable area, the positional deviation allowable range can be expanded.

Next, another embodiment of the present invention will be described with reference to FIG. The connection structure between the circuit board and the circuit board according to the present embodiment is different from that of the previous embodiment in that instead of forming the conductor lines 31 and 31 'on the patterns 2 and 2', respectively, as shown in the figure, the patterns 2 and 2'are formed. The conductor wires 32, 32 'are connected to the front end of the ???

In the case of this embodiment, the conductor lines 32 and 32 'extending from the patterns 2 and 2'of the circuit boards 1 and 1'are made to face each other so as to cross each other as shown in FIG. As described above, the conductor wires 32, 32 'are pressed to make an electric contact. In this case as well, as in the previous embodiment, the positional deviation allowable range can be expanded to ensure reliable connection.

In each of the above-described embodiments, the conductor lines 31, 31 ′ and the conductor lines 32, 32 ′ are arranged in the same arranging direction. Since it suffices that the two intersect when they are connected, it is possible to change these directions alternately to the opposite directions.

Further, in the connection structure between the circuit boards of the present invention, a configuration combining the above-described embodiments, that is, the first conductor line is formed on the pattern of one circuit board, and the other one is formed. It is also possible that the second conductor wire is provided so as to be coupled to the tip of the pattern of the circuit board, and the first and second conductor wires are pressed and contacted so as to intersect with each other.

[0023]

[Effect of device]

 As described above, according to the connection structure between the circuit boards of the present invention, the fine conductor wires (connection terminals) provided on the circuit boards are pressed and contacted while crossing each other. Since the circuit boards can be connected to each other, the positional deviation allowable range can be expanded, and the connection with high contact pressure can be reliably performed with a low operating force. Further, since the conductor wire is provided at the tip of the pattern, in this case, the conductor wire can be simultaneously formed in the step of forming the pattern for the circuit board, so that the number of manufacturing steps can be shortened and the cost can be reduced. There is an advantage called.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main configuration of a connection structure between circuit boards according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a positional relationship between circuit boards before connection in the connection structure shown in FIG.

3 is a perspective view showing a positional relationship between the circuit boards after connection in the connection structure shown in FIG.

FIG. 4 is a perspective view showing a configuration of a main part of a connection structure between circuit boards according to another embodiment of the present invention.

5 is a perspective view showing a positional relationship between the circuit boards before connection in the connection structure shown in FIG.

6 is a perspective view showing a positional relationship between the circuit boards after connection in the connection structure shown in FIG.

FIG. 7 is a side view showing a configuration of a main part of a conventional connection structure between circuit boards.

[Explanation of symbols]

 1, 1'Circuit board 2, 2'Pattern 4 Projection part 5, 5'Protective layer 31, 31 ', 32, 32' Conductor wire

Claims (5)

[Scope of utility model registration request] 1. A connection structure between circuit boards in which a first circuit board provided with a first connection terminal and a second circuit board provided with a second connection terminal are connected to each other,
The connection structure between circuit boards, wherein the first and second connection terminals are crossed and connected to each other. 2. The connection structure between circuit boards according to claim 1, wherein the first connection terminal is a first conductor wire formed on a pattern on the first circuit board, The second connection terminal is a second conductor wire formed on a pattern on the second circuit board, and the first and second conductor wires intersect each other and are pressed and contacted with each other. Connection structure between circuit boards. 3. The connection structure between circuit boards according to claim 1, wherein the first connection terminal is a first conductor wire coupled to a tip of a pattern on the first circuit board, The second connecting terminal is a second conductor wire coupled to the tip of the pattern on the second circuit board, and includes the first and second connecting wires.
The connecting structure between the circuit boards is characterized in that the conductor wires of are crossed and pressed against each other. 4. The connection structure between circuit boards according to claim 1, wherein the first connection terminal is a first conductor line formed on a pattern on the first circuit board, The second connection terminal is a second conductor wire connected to the tip of the pattern on the second circuit board, and the first and second conductor wires intersect each other and are pressed and contacted. The characteristic connection structure between circuit boards. 5. The connection structure between circuit boards according to claim 1, wherein the pattern extends in a predetermined direction, and at least one of the first and second conductor lines is formed. A connection structure between circuit boards, wherein the connection structure extends obliquely with respect to the predetermined direction.